古顶水利枢纽二线船闸下引航道布置物理模型试验研究
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摘要
多线船闸布置中引航道口门区及连接段通航水流条件是一个重要的研究课题。以古顶水利枢纽二线船闸通航水力学试验为例,研究古顶二线船闸在修建背景下,船闸下引航道口门区及连接段通航水流情况。试验结果表明,口门区及连接段回流及横流流速超标。因此,从布置导航墙、疏浚引航道连接段两方面着手,提出多种优化布置方案,并推荐布置70 m外挑导航墙(50 m直墙+20 m外挑)和疏浚连接段相结合的方式。研究成果为古顶水电站二线船闸的优化布置提供了参考。
The navigable flow condition of the entrance area and connecting section of the approach channel in muti-line ship locks is a key research topic. Taking the navigation hydraulics test of the second-line lock of Guding water conservancy hub as an example,this paper studies the navigable flow conditions in the entrance and connecting section of the lower approach channel under the background of the construction of Guding second-line lock.The test results show that the velocity of reflux and cross flow in the entrance and connecting section exceeds related standard. Therefore, from the two aspects of layout of navigation wall and dredging approach channel connection section,this paper puts forward a variety of optimal layout schemes,and recommends the combination of layout of 70 m external cantilever navigation wall( 50 m vertical wall + 20 m external cantilever) and dredging connection section to improve navigable environment.The research results provide a reference for the optimal layout of the second line lock of the Guding hydropower station.
The navigable flow condition of the entrance area and connecting section of the approach channel in muti-line ship locks is a key research topic. Taking the navigation hydraulics test of the second-line lock of Guding water conservancy hub as an example,this paper studies the navigable flow conditions in the entrance and connecting section of the lower approach channel under the background of the construction of Guding second-line lock.The test results show that the velocity of reflux and cross flow in the entrance and connecting section exceeds related standard. Therefore, from the two aspects of layout of navigation wall and dredging approach channel connection section,this paper puts forward a variety of optimal layout schemes,and recommends the combination of layout of 70 m external cantilever navigation wall( 50 m vertical wall + 20 m external cantilever) and dredging connection section to improve navigable environment.The research results provide a reference for the optimal layout of the second line lock of the Guding hydropower station.
引文
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[2]田进,徐启航.濛里枢纽二线船闸通航水流条件试验研究[J].水科学与工程技术,2017(3):83-86.
[3]徐进超,宣国祥,刘本芹,等.贵港二线船闸下引航道物理模型试验研究[J].水利水运工程学报,2017(6):9-13.
[4]中交水运规划设计院.船闸总体设计规范:JTJ 305-2001[S].北京:人民交通出版社,2001.
[5]南京水利科学研究院.水工(常规)模型试验规程:SL155-2012[S].北京:中国水利水电出版社,2012.
[6]蔡守允,刘兆衡,张晓红,等.水利工程模型试验量测技术[M].北京:海洋出版社,2008.
[7]徐慧敏.关于水利工程中河道糙率的研究[J].水利科技与经济,2010,16(11):1253-1256.
[8]王云莉,孙国栋,李艳,等.北江濛里枢纽上游引航道通航水流条件试验研究[J].水运工程,2016(4):105-112.